Every time I drive home, having to search for the remote control to unlock the door is quite a hassle, so I decided to custom‑make a 433 MHz remote‑control housing tailored to the original car’s location.

Structural Diagram:

I used 6×6 microswitches—available on e‑commerce platforms in batches of dozens for just a few yuan—and repurposed a 433 MHz remote control purchased from Taobao as a duplicate. All that was needed was to solder DuPont wires to connect everything.

Here’s the finished physical model. [Since I don’t currently have any AMS requirements, I printed it in monochrome; later, for the lettering, I’ll simply use a liner pen and acrylic paints to trace and color the details.]